DE60029298T2 - Brake disc for a disc brake - Google Patents

Abstract

A disk-brake disk (1) which is unusually safe, comprises a braking band (3) for cooperating with brake calipers in order to exert a braking effect on a vehicle, the braking band (3) comprising a shaped body (4) which extends about an axis of symmetry (X-X) and is defined laterally by braking surfaces (5, 6), the body (4) being made of composite material which can be produced by causing a mixture comprising bundles of filaments (7) constituted substantially by carbon, arranged randomly and having dimensions no greater than 30 mm, to interact with silicon at a temperature high enough to bring about fusion of the silicon. The disk is characterized in that a plurality of reinforcing fibres are incorporated in the shaped body (4) and extend around the shape of the body (4) in a manner such as to prevent the propagation of cracks.

Description

The The present invention relates generally to a disc brake disc.

US-A-5 230 946 discloses a coated carbon-carbon composite material, a core of fibers in a carbon matrix and a Antioxidant cladding layer of silicon carbide comprises.

More accurate The present invention relates to a disc brake disc, the one brake band for The cooperation with brake calipers includes to provide a braking effect to exercise a vehicle. The brake band comprises a body that extends around an axis of symmetry and laterally defined by braking surfaces is. The body can be prepared by mixing a mixture, bundling essentially carbon-containing fibers is going to interact with silicon at a temperature that is high is enough to cause a melting of the silicon.

Of the Expression "fibers, which are essentially made of carbon "should comprise fibrous materials, the pyrolysis of various products of synthetic origin, such as As polyacrylonitrile (PAN) or polysilazane, or natural Origin, such. As pitch or cellulose based natural sources, such as Vegetable fibers and wood.

Of the Expression "bundle of Fibers "should be groups of fibers variable from 3,000 to 50,000 units and with diameters between 2 and 3 μm, which linked together are and with a synthetic resin such. B. polyurethane resin are impregnated, lock in. The bundles will be afterwards broken up, giving them lengths of less than 30 mm, and finally become in the Mixture arranged randomly.

These are randomly arranged fiber bundles usually based on the number of units that make up the bundle, defined, such. B. 3K, 10K, 50K and the like.

It is known, ceramic composite materials in various applications to use that has good impact resistance, compression resistance and resistance against heat generated by friction require these properties by purely ceramic materials because of their inherent Fragility can not be ensured.

More accurate ceramic composite materials are used for brake applications the interaction of silicon with a mixture, the bundling of Contains carbon fibers and additives, produced at a temperature, at which the silicon is in the molten state.

Fiber bundles, like were defined above during the production of the above-mentioned Materials used as a composite material with acceptable cohesive properties generally produced with relatively low production costs.

According to the state of technology these composite materials are prepared in the following way: The fiber bundles be with an aggregate resin, pitches and other additives mixed, wherein the mixture is placed in a mold in the it by means of warming and exercise from pressure to a molded semi-finished product produce.

The semi-finished product is then a first burning in subjected to an oven at such a temperature, the carburization or Pyrolysis of the resin causes.

When Result of this burning takes the semi-finished product due the loss of fleeting Material at carburizing or pyrolysis temperatures one Degree of porosity at.

The burned semi-finished product is then a second burning in the presence of silicon at such a temperature, the one melting the silicon and infiltrating it in causes the pores of the semi-finished product.

The Infiltration of silicon increased the cohesion the bundle of carbon fibers, wherein at the same time the molten silicon partly with the carbon of the semi-finished product among the Conditions of the second firing reacts, reducing silicon carbides formed, which improves the cohesive properties of the material cause.

The composite material produced by the above-described method becomes common in the manufacture of brake and clutch elements for vehicles used, in particular for Disc brakes, due to its good compression strength properties and durability against heat generated by friction and against wear.

Despite the above-mentioned good properties, the disc brake discs made of this composite have the serious drawback that any cracks or fractures formed therein due to thermal and / or compression stresses can tend to spread quickly through the structure of this material, causing it to completely digest.

The Use of the known discs for vehicle disc brakes leads therefore clearly to considerable dangers for the safety of users.

The Problem on which the present invention is based is that of proposing a disc brake disc, the structural and functional characteristics so that the disadvantages mentioned with reference to the prior art be eliminated.

This Problem is solved through a disc brake disc, which is a brake band for cooperation with brake calipers in order to exert a braking effect on a vehicle, wherein the brake band comprises a molded body that extends around one Symmetryeachse extends and laterally defined by braking surfaces is, the body being out made of a composite material that can be manufactured by causing a mixture comprising bundles of fibers which essentially formed of carbon and arranged indiscriminately are and have dimensions of not more than 30 mm, with silicon to interact at a temperature high enough to one Melting of the silicon, characterized that a plurality of reinforcing fibers in the molded body are introduced and extend around the shape of the body in a manner so that the spread of cracks is prevented.

The The present invention is based on the surprising discovery that the introduction of reinforcing fibers into a mixture, the bunch of randomly arranged fibers within the body of the disc brake disc comprises a disc of composite material having a shaped one body produces good cohesive properties at the same time as the propagation of cracks by the can prevent entire shape when using the disc.

The reinforcing fibers extend in the pane structure of the composite material according to the invention preferably around their entire shape.

alternative can the reinforcing fibers only be provided in certain areas of the disc, z. Tie Areas where cracks occur, as well as in areas caused by Crack propagation paths are affected, these areas easily identifiable on the basis of structural calculations are.

To the Example is in the case of an axisymmetric structure, such as. B. a disc brake disc, from structural calculations clearly that the crack propagation paths are most likely radial relative to the body are arranged and spread from the interior of the disc towards the exterior, to an extent which causes the disc to explode.

In a disk brake disk is therefore the propagation of cracks prevented by the reinforcing fibers z. B. annular Sections of the disc are arranged with increasing dimension.

It It is important that the reinforcing fibers be satisfactory cohesive properties to other components of the composite material that the disc forms to prevent the entire structure in use is unlocked, even in the absence of cracks or fractures.

In addition, should the reinforcing fibers with respect to Components of the composite material to be substantially inert, and should have a reasonable ability have the temperatures of pyrolysis and infiltration of the Siliciums resist their decomposition during the manufacture of the Avoid disc-forming material.

For this purpose, the material of the reinforcing fibers is preferably formed from carbon fibers. However, it is possible to use other materials, such as. As SiC, Si ₃ N ₄ and TiC, and metals such. Platinum, which can withstand the temperatures of interaction with silicon.

The reinforcing fibers can be introduced in different ways in the material. For example can the reinforcing fibers in several bundles be arranged, which are arranged in predefined directions.

These Directions can z. B. warp and weft directions, wherein the bundles a Forming tissue.

alternative can the reinforcing fibers form a non-woven fabric, such. B. a felt.

The reinforcing fibers can also form one or more layers within the body of the disk.

• – Bündel von Fasern 40–70%, vorzugsweise 50–60%,
• – Bindemittel 5–30%, vorzugsweise 15–25%,
• – Zusatzstoffe 0,5–20%, vorzugsweise 1–15%,
• – Verstärkungsfasern 4–30%, vorzugsweise 10–20%.

The amounts of the components contained in the composite material having the shape of a disk may vary as volume percentages with respect to the volume of the material as follows:

• - Bundles of fibers 40-70%, preferably 50-60%,
• Binder 5-30%, preferably 15-25%,
• Additives 0.5-20%, preferably 1-15%,
• - Reinforcing fibers 4-30%, preferably 10-20%.

Further Features and advantages of the disc brake disc according to the invention will be understood from the following description of their preferred embodiments, by means of a non-limiting Example, with reference to the accompanying drawings, in which:

1 by means of a block diagram shows the main steps required for the manufacture of a disc brake disc according to the present invention;

2 a perspective view of a disc brake disc according to the invention;

3 a perspective view of a brake band of a disc brake disc according to the invention;

4 a partially cut-away, perspective view of a detail of a brake band of a disc brake disc is;

5 a shown with the arrow V detail of the brake band of 4 on an enlarged scale;

6 to 9 in plan view, four different embodiments of a component of the brake band of 4 demonstrate; and

10 and 11 are partially cutaway, perspective views of details of a component of a brake band according to another embodiment.

• a) Mischen einer vorgegebenen Menge von Faserbündeln, die im Wesentlichen von Kohlenstoff gebildet werden und Längen von nicht mehr als 30 mm aufweisen, mit einer vorgegebenen Menge eines organischen Bindemittels, um ein Gemisch zu erhalten,
• b) Platzieren des Gemisches in einer Form mit geeigneter Gestalt und gleichzeitiges Einbringen einer Mehrzahl von Verstärkungsfasern in das Gemisch, die sich um die Form erstrecken, derart, dass sie die Ausbreitung von Rissen verhindern,
• c) Formen des Gemisches, das die Verstärkungsfasern enthält, um ein halbfertiges Produkt herzustellen,
• d) Unterwerfen des halbfertigen Produkts einem ersten Brennen bei einer Temperatur, bei der im Wesentlichen eine Karburierung oder Pyrolyse des organischen Bindemittels herbeigeführt wird,
• e) Unterwerfen des gebrannten halbfertigen Produkts einem zweiten Brennen unter Anwesenheit von Silicium bei einer Temperatur, bei der im Wesentlichen ein Schmelzen des Siliciums und ein Infiltrieren desselben in das Halbleiterprodukt herbeigeführt wird, um das geformte Verbundmaterial herzustellen.

How out 1 becomes clear, the ceramic composite material from which the body of the disc brake disc is made, can be prepared by the following method, which is given by way of example only:

• a) blending a predetermined amount of fiber bundles formed substantially of carbon and having lengths of not more than 30 mm with a predetermined amount of an organic binder to obtain a mixture,
• b) placing the mixture in a mold of suitable shape and simultaneously introducing a plurality of reinforcing fibers into the mixture extending around the mold so as to prevent the propagation of cracks,
• c) shaping the mixture containing the reinforcing fibers to produce a semi-finished product,
• d) subjecting the semi-finished product to a first firing at a temperature substantially causing carburization or pyrolysis of the organic binder,
• e) subjecting the fired semi-finished product to a second baking in the presence of silicon at a temperature substantially causing melting of the silicon and infiltrating it into the semiconductor product to produce the shaped composite material.

in the The above-described methods can be fiber bundles Diameter of 0.1 to 2 mm, preferably 0.3 to 0.5 mm.

The Amount of fiber bundles contained in the mixture can be from 5 vol .-% to 80% by volume with respect to Volumes of the mixture vary, and is preferably within the range of 60% to 70%.

The fiber bundles and / or the reinforcing fibers can in advance with a protective resin be coated, preferably polyurethane resin, before it accordingly the above-described method can be used.

alternative can the fiber bundles and the reinforcing fibers be coated in advance with the same organic binder, which is used to prepare the mixture.

A greater cohesion of the Materials and a more compact product can thus be obtained.

During the first burning the semi-finished product carburate the resin and the organic binder, wherein a protective layer on the fiber bundles and on the reinforcing fibers is generated, this before a digestion or even dissolution during the Preserve subsequent treatment with silicon.

The fiber bundles and the reinforcing fibers can thus over the Process away its original Keep shape so that a material with good cohesion and Strength properties is generated.

The Organic binders is a conventional binder that will be selected can be selected from the group consisting of phenolic and acrylic resins, paraffin, pitches, Polystyrenes and the like.

The Binder is preferably selected from the group, the pitches and phenolic resins.

The Binder may be added to the mixture in any desired Form are added, for. B. in solid, semi-liquid or liquid state, or in solution.

The Phenolic resin may, for. In the form of pellets, powders or granules be added.

The Amount of organic binder in the mixture may be from 5% by volume to 30% by volume with respect to Volumes of the mixture vary, and is preferably within the range of 20 to 26%.

The Mixture may also be other conventional Contain additives as fillers and, indirectly, for Regulate the porosity and the density of the desired Composite material can be used.

These Additives are formed from particles of inorganic materials, such as B. preferably graphite, silicon carbide or metal carbides or -nitrides in powder form.

The Amount of additives can be from 0.7 vol.% To 23 vol.% Relative to the Volumes of the mixture vary, and is preferably within the range of 9% to 15%.

The Mixing can be done in conventional Way and with a conventional one Device performed be, with the fiber bundles be randomly arranged in different directions.

The reinforcing fibers can be introduced into the mixture in various ways.

• i) Anordnen einer ersten Schicht des Gemisches um die Gestalt der Form,
• ii) Zufügen einer Mehrzahl von Verstärkungsfasern auf die erste Lage des Gemisches, die sich um die Gestalt in einer Weise erstrecken, so dass sie die Ausbreitung von Rissen verhindern,
• iii) Anordnen einer zweiten Schicht des Gemisches auf der ersten Schicht, um somit die Mehrzahl von Verstärkungsfasern vollständig abzudecken.

According to a preferred mode of implementation of driving, the introduction is performed with the steps:

• i) arranging a first layer of the mixture around the shape of the mold,
• ii) adding a plurality of reinforcing fibers to the first layer of the mixture which extend around the shape in a manner to prevent the propagation of cracks,
• iii) placing a second layer of the mixture on the first layer so as to completely cover the plurality of reinforcing fibers.

The reinforcing fibers can are added to the mixture in the form of a plurality of bundles, the are arranged in predefined directions.

These predefined directions can be warp and weft directions so that the bundles form a fabric. alternative are several bundles of reinforcing fibers combined or twisted together to form a single warp or weft for to form the formation of the tissue.

The Fabric can be 2 to 30 reinforcing fibers per cm, preferably 5-8 fibers / cm.

alternative can the reinforcing fibers form a non-woven fabric, such. B. a felt.

The Amount of reinforcing fibers, which is introduced into the mixture depends on the required Reinforcing fiber content of the final Composite, this content within the range from 4-30 Vol .-% with respect the volume of the material is preferably 10-20%.

The Of course, the above-described stratification steps can with a given frequency be repeated, thus a multilayer composite material in which each layer of reinforcing fibers is between two Layers of the mixture comprising fiber bundle is embedded.

During the molding step of the process of the invention, the mixture containing the reinforcing fibers is heated in the mold to a temperature of from 80 ° C to 180 ° C, preferably to 100-120 ° C, with a pressure of between 0.1 N / cm ² and 5 N / cm ² , preferably 0.5-1 N / cm ² .

The molded and compacted semi-finished product which is thus obtained is removed from the mold and then subjected to a first firing, thus to carburize the organic binder (step d, pyrolysis).

This Burning is in a conventional Furnace is carried out at a temperature substantially from Type of binder used, and generally within of the range of 900-1200 ° C.

The Burning is in the presence of a protective gas stream, such. Nitrogen or argon, and with an overpressure from 10-100 mbar, preferably 20-30 mbar, performed.

Of the Stream also preferably eliminates the gases passing through the pyrolysis of the organic binder are released.

During this Step of the process, the semi-finished product obtained a greater porosity, which in the Subsequent burning is important as it is the molten silicon allowed to infiltrate here.

According to one embodiment For example, the method may further include a step of processing the raw material or rework the surface of the half-finished product, by means of the first burning of the step d) has been generated.

This allows any surface deformations of the semi-finished product by means of a conventional device, to give him the desired To give shape.

Of the Post-processing step is preferably carried out dry, z. B. by means of diamonds, since the semi-finished product, after the first firing a degree of porosity has accepted, liquid Substances may adversely absorb substances when post-processing wet done becomes.

The semi-finished product, according to the step d) is fired, a second burning in the presence subjected to silicon (step e).

Around to perform the second burning, is the semi-finished product, the burned and the possible Has been subjected to post-processing, inserted into the chamber of a container, a volume approximately equal to twice the half-finished product which formed between the semi-finished product and the container Space filled with silicon which surrounds the semi-finished product. The amount of used Silicon corresponds to that needed to pores of the to fill half-finished product, or something more.

pure Silicon or an alloy of silicon and aluminum or copper in granular or powder form is used to fill the room.

The Chamber can with the outside over suitable holes to be in contact with during the derived from burning gases released.

After this filled in the silicon the container becomes in a suitable conventional oven used, which is heated to a temperature of 1400-1700 ° C.

at At these temperatures, the silicon melts and infiltrates the pores of the semi-finished product (silicate).

The Firing is carried out under partial vacuum at a reduced pressure of 900 mbar to 300 mbar, preferably from 800 to 500 mbar performed.

at Completion of firing, the composite material is cooled, z. B. with argon or preferably with nitrogen, so that the remaining silicon solidified in small spheres, which easily out the container can be recovered.

The Washer made of the composite material according to the invention, thus may be produced Surface finishing operations be subjected to dry or wet in conventional Manner performed can be.

It it is clear that the steps involved in firing in an oven d. H. the pyrolysis and silicatation steps, in a single Oven can take place which reduces the manufacturing time and complexity of the device.

The material described above can directly as a disc brake disc 1 be formed, which is a bell 2 for their connection to the support structure and a brake band 3 includes ( 2 ).

Alternatively, the composite material is used as a brake ring or band 3 shaped for a disc to be attached to a separate carrier bell made of the same material or of another material, such. As aluminum or steel, is made by means of several seats or holes 2a evenly around an inner annular section 4a the same are distributed ( 3 ). According to another embodiment, this inner annular portion 4a also several extensions or projections 4b with holes 2a for the connection with the bell ( 4 ).

The brake band 3 has an annular body 4 which extends around an axis of symmetry and rotation XX. The body 4 is laterally by braking surfaces 5 and 6 defined for cooperation with brake calipers to exert a braking effect on a vehicle. The braking surfaces 5 . 6 are parallel to each other, with a thickness of the body 4 , in 4 indicated by S, defined between them.

As described above, the body comprises 4 Bundles of carbon fibers 7 with lengths of less than 30 mm, z. B. 5 mm, the random in the binder 8th formed by the aggregate resin with additives fired under interaction with silicon ( 4 and 5 ).

The above-described reinforcing fibers 9 be in the body 4 brought in. For example, the reinforcing fibers 9 Bundles of carbon fibers. According to one embodiment, the reinforcing fibers are a plurality of bundles of reinforcing fibers arranged in a crossed or aligned arrangement in a single plane 10 is are orders. More specifically, the multiple bundles of reinforcing fibers 9 arranged relative to each other so as to form a reinforcing structure, generally with 11 designated ( 6 to 11 ). For example, the reinforcing structure is in the form of a net 12 on. The network is advantageously flat and annular, thus at least one internal layer 13 of the body 4 to build ( 4 ).

According to one embodiment, the network 12 mesh 14 on through the bundles of reinforcing fibers 9 which are twisted together, are formed.

According to one embodiment of the invention, to prevent the propagation of cracks in the brake band 3 or, in other words, to provide obstacles in the calculated or predefined crack paths, the net-like reinforcement structure 12 bundles of reinforcing fibers 9 formed concentrically, accompanied by bundles of reinforcing fibers 9 which are arranged substantially radially ( 6 ).

According to one embodiment, the reinforcing structure is 11 parallel to the braking surfaces 5 . 6 arranged ( 4 ). For example, the net-like reinforcement structure is 12 in the middle of the body 4 the disc 1 arranged.

According to a further embodiment, a plurality of reinforcing structures 11 , z. B. several reticulated reinforcing structures 12 , in the body 4 used. For example, the multiple net-like reinforcement structures 12 in the body 4 at 1/3 (S ') of its thickness (S) and at 2/3 (S'') of its thickness (S).

The Slice of the composite material according to the invention is characterized by its optimal friction properties, its hardness, its Flexural strength, its durability against wear and tear against heat generated by friction, their impact resistance and Their compression strength makes them suitable for use in braking applications makes it particularly suitable.

Of the Main advantage of the disc of the composite material according to the invention lies in the fact that it is very safe in use, because there are any cracks or breaks, while in the disk of use, not to complete digestion of the structure to lead, because of their propagation through the reinforcing fibers, which in the material embedded are prevented.

One Another advantage of the disc of the composite material according to the invention is that it can also be made easily and economically, without any significant additional Cost or special tooling are required.

Actually Note that the disc of the composite material according to the invention by means of conventional Techniques can be made which are based on the production of the corresponding known composite material can be applied.

It it is clear that variants and / or additions to those described above and illustrated embodiments can be provided.

As an alternative to the in 6 the arrangement shown becomes the net-like reinforcing structure 12 bundles of reinforcing fibers 9 formed concentrically, accompanied by bundles of reinforcing fibers 9 which are arranged transversely so that they are arranged along arcs of circles or spirals ( 8th ).

According to one embodiment, the bundles of reinforcing fibers 9 that the net-like reinforcement structure 12 knotted at some or all geometric intersections ( 7 ).

As an alternative to the one in the 6 to 8th The arrangement shown comprises the reinforcing structure 11 several bundles of reinforcing fibers 9 that are interwoven with each other ( 9 ).

According to a further embodiment, the reinforcing structure is 11 three-dimensional ( 10 and 11 ). For example, there are several bundles of reinforcing fibers 9 nested or interwoven to multiple layers 13 to form, which is parallel to the braking surfaces 5 . 6 are arranged. The layers are transversal with each other by means of a second plurality of bundles of reinforcing fibers 9 connected, z. At the intersections of the bundles that make up the layers 13 form ( 10 ). Alternatively, layers 13 provided, which is relative to the braking surfaces 5 and 6 are arranged transversely, or, in other words, layers that are bundles of reinforcing fibers 9 which are alternately crossed, interlaced or interwoven to form concentric rings. If these layers 13 are introduced into the body of the disk, they divide the possible crack propagation lines into sections or sections, thus preventing the cracks from continuing beyond the distance between two successive layers 13 spread.

As an alternative to the three-dimensional reinforcing structure, it is possible to have a plurality of reinforcing fibers in the body of the disk or bundles of reinforcing fibers associated with each other around a non-woven fabric form so that they are arranged crosswise, or, in other words, that they block possible crack formation paths.

Around a quota and specific requirements can be met a person skilled in the above-described preferred embodiments the disc brake disc many modifications, adjustments and Substitutions of elements by other functionally equivalent ones To make elements without departing from the scope of the appended claims.

Claims (19)

Disc brake disc ( 1 ), comprising: a brake band ( 3 ) for cooperation with brake calipers to exert a braking effect on a vehicle, the brake band ( 3 ) a shaped body ( 4 ) which extends around an axis of symmetry (xx) and laterally by braking surfaces ( 5 . 6 ), where the body ( 4 ) is made of a composite material prepared by providing a mixture containing bundles of fibers ( 7 ) which are randomly arranged and have dimensions of not more than 30 mm, wherein a plurality of reinforcing fibers are introduced into the molded body (FIG. 4 ) and about the shape of the body ( 4 The binder is made porous by pyrolysis of the mixture and causes the mixture to interact with molten silicon, the bundles of the fibers and the fibers extending from each other in a manner that prevents crack propagation Reinforcing fibers in the composite material, as obtained by the interaction with silicon, are formed substantially from carbon. Disc ( 1 ) according to claim 1, in which the mixture is a binder ( 8th ). Disc ( 1 ) according to claim 2, in which the binder ( 8th ) is an organic binder selected from a group comprising phenolic resins and acrylic resins, paraffin, pitches and polystyrenes. Disc ( 1 ) according to any one of the preceding claims, in which the reinforcing fibers are carbon fibers. Disc ( 1 ) according to any one of the preceding claims, in which the fibers of the plurality of reinforcing fibers are in a plurality of bundles ( 9 ) distributed in predefined directions. Disc ( 1 ) according to claim 5, in which the bundles of reinforcing fibers ( 9 ) are distributed in an alternately crossed or aligned arrangement. Disc ( 1 ) according to claim 5 or claim 6, in which the bundles of reinforcing fibers ( 9 ) are arranged in a single plane. Disc ( 1 ) according to any one of claims 5 to 7, in which the bundles of reinforcing fibers ( 9 ) are arranged relative to one another in such a way that they have a reinforcing structure ( 11 ) in the form of a network ( 12 ) form. Disc ( 1 ) according to claim 8, in which the network ( 12 ) Meshes ( 14 ) of the twisted together bundles of reinforcing fibers ( 9 ) are formed. Disc ( 1 ) according to claim 8 or claim 9, in which the net-like reinforcement structure ( 12 ) of bundles of reinforcing fibers ( 9 ) which is concentric with the axis of symmetry (XX) of the body (XX) 4 ) and which bundles of reinforcing fibers ( 9 ) which are substantially radially with respect to the body ( 4 ) are arranged. Disc ( 1 ) according to claim 8 or 9, in which the net-like reinforcement structure ( 12 ) of bundles of reinforcing fibers ( 9 ) which is concentric with the axis of symmetry (XX) of the body (XX) 4 ) are arranged, and which bundles of reinforcing fibers ( 9 ) arranged transversely with respect to the concentric bundles so as to form arcs of circles or spirals. Disc ( 1 ) according to any one of claims 8 to 11, in which the bundles of reinforcing fibers ( 9 ) comprising the reticulated reinforcement structure ( 12 ) are knotted together at some or all geometric intersections. Disc ( 1 ) according to any one of claims 5 to 12, in which the bundles of reinforcing fibers ( 9 ) to form a warp and weft of a fabric. Disc ( 1 ) according to any one of claims 8 to 13, in which the reticulated reinforcing structure ( 12 ) parallel to the braking surfaces ( 5 . 6 ) is arranged. Disc ( 1 ) according to any one of claims 8 to 14, in which the net-like reinforcing structure ( 12 ) in the middle of the body ( 14 ) is arranged. Disc ( 1 ) according to any one of claims 8 to 15, in which a plurality of reticulated reinforcing structures ( 12 ) in the body ( 4 ) are embedded. Disc ( 1 ) according to claim 16, in which network-like connection structures ( 12 ) three sections of the body ( 4 ) define. Disc ( 1 ) according to any one of claims 8 to 17, in which the reinforcing structure ( 11 ) is three-dimensional. Disc ( 1 ) according to any one of claims 1 to 5, wherein said plurality of reinforcing fibers forms a nonwoven fabric.